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   1 /*
   2  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   3  *              operating system.  INET is implemented using the  BSD Socket
   4  *              interface as the means of communication with the user level.
   5  *
   6  *              This file implements the various access functions for the
   7  *              PROC file system.  This is very similar to the IPv4 version,
   8  *              except it reports the sockets in the INET6 address family.
   9  *
  10  * Version:     $Id: proc.c,v 1.17 2002/02/01 22:01:04 davem Exp $
  11  *
  12  * Authors:     David S. Miller (davem@caip.rutgers.edu)
  13  *              YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
  14  *
  15  *              This program is free software; you can redistribute it and/or
  16  *              modify it under the terms of the GNU General Public License
  17  *              as published by the Free Software Foundation; either version
  18  *              2 of the License, or (at your option) any later version.
  19  */
  20 #include <linux/sched.h>
  21 #include <linux/socket.h>
  22 #include <linux/net.h>
  23 #include <linux/ipv6.h>
  24 #include <linux/proc_fs.h>
  25 #include <linux/seq_file.h>
  26 #include <linux/stddef.h>
  27 #include <net/sock.h>
  28 #include <net/tcp.h>
  29 #include <net/transp_v6.h>
  30 #include <net/ipv6.h>
  31
  32 #ifdef CONFIG_PROC_FS
  33 static struct proc_dir_entry *proc_net_devsnmp6;
  34
  35 static int fold_prot_inuse(struct proto *proto)
  36 {
  37         int res = 0;
  38         int cpu;
  39
  40         for_each_possible_cpu(cpu)
  41                 res += proto->stats[cpu].inuse;
  42
  43         return res;
  44 }
  45
  46 static int sockstat6_seq_show(struct seq_file *seq, void *v)
  47 {
  48         seq_printf(seq, "TCP6: inuse %d\n",
  49                        fold_prot_inuse(&tcpv6_prot));
  50         seq_printf(seq, "UDP6: inuse %d\n",
  51                        fold_prot_inuse(&udpv6_prot));
  52         seq_printf(seq, "RAW6: inuse %d\n",
  53                        fold_prot_inuse(&rawv6_prot));
  54         seq_printf(seq, "FRAG6: inuse %d memory %d\n",
  55                        ip6_frag_nqueues, atomic_read(&ip6_frag_mem));
  56         return 0;
  57 }
  58
  59 static struct snmp_mib snmp6_ipstats_list[] = {
  60 /* ipv6 mib according to RFC 2465 */
  61         SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES),
  62         SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
  63         SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
  64         SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
  65         SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
  66         SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
  67         SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
  68         SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
  69         SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
  70         SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
  71         SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS),
  72         SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
  73         SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
  74         SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
  75         SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
  76         SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
  77         SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
  78         SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
  79         SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
  80         SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
  81         SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
  82         SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
  83         SNMP_MIB_SENTINEL
  84 };
  85
  86 static struct snmp_mib snmp6_icmp6_list[] = {
  87 /* icmpv6 mib according to RFC 2466
  88
  89    Exceptions:  {In|Out}AdminProhibs are removed, because I see
  90                 no good reasons to account them separately
  91                 of another dest.unreachs.
  92                 OutErrs is zero identically.
  93                 OutEchos too.
  94                 OutRouterAdvertisements too.
  95                 OutGroupMembQueries too.
  96  */
  97         SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
  98         SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
  99         SNMP_MIB_ITEM("Icmp6InDestUnreachs", ICMP6_MIB_INDESTUNREACHS),
 100         SNMP_MIB_ITEM("Icmp6InPktTooBigs", ICMP6_MIB_INPKTTOOBIGS),
 101         SNMP_MIB_ITEM("Icmp6InTimeExcds", ICMP6_MIB_INTIMEEXCDS),
 102         SNMP_MIB_ITEM("Icmp6InParmProblems", ICMP6_MIB_INPARMPROBLEMS),
 103         SNMP_MIB_ITEM("Icmp6InEchos", ICMP6_MIB_INECHOS),
 104         SNMP_MIB_ITEM("Icmp6InEchoReplies", ICMP6_MIB_INECHOREPLIES),
 105         SNMP_MIB_ITEM("Icmp6InGroupMembQueries", ICMP6_MIB_INGROUPMEMBQUERIES),
 106         SNMP_MIB_ITEM("Icmp6InGroupMembResponses", ICMP6_MIB_INGROUPMEMBRESPONSES),
 107         SNMP_MIB_ITEM("Icmp6InGroupMembReductions", ICMP6_MIB_INGROUPMEMBREDUCTIONS),
 108         SNMP_MIB_ITEM("Icmp6InRouterSolicits", ICMP6_MIB_INROUTERSOLICITS),
 109         SNMP_MIB_ITEM("Icmp6InRouterAdvertisements", ICMP6_MIB_INROUTERADVERTISEMENTS),
 110         SNMP_MIB_ITEM("Icmp6InNeighborSolicits", ICMP6_MIB_INNEIGHBORSOLICITS),
 111         SNMP_MIB_ITEM("Icmp6InNeighborAdvertisements", ICMP6_MIB_INNEIGHBORADVERTISEMENTS),
 112         SNMP_MIB_ITEM("Icmp6InRedirects", ICMP6_MIB_INREDIRECTS),
 113         SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
 114         SNMP_MIB_ITEM("Icmp6OutDestUnreachs", ICMP6_MIB_OUTDESTUNREACHS),
 115         SNMP_MIB_ITEM("Icmp6OutPktTooBigs", ICMP6_MIB_OUTPKTTOOBIGS),
 116         SNMP_MIB_ITEM("Icmp6OutTimeExcds", ICMP6_MIB_OUTTIMEEXCDS),
 117         SNMP_MIB_ITEM("Icmp6OutParmProblems", ICMP6_MIB_OUTPARMPROBLEMS),
 118         SNMP_MIB_ITEM("Icmp6OutEchoReplies", ICMP6_MIB_OUTECHOREPLIES),
 119         SNMP_MIB_ITEM("Icmp6OutRouterSolicits", ICMP6_MIB_OUTROUTERSOLICITS),
 120         SNMP_MIB_ITEM("Icmp6OutNeighborSolicits", ICMP6_MIB_OUTNEIGHBORSOLICITS),
 121         SNMP_MIB_ITEM("Icmp6OutNeighborAdvertisements", ICMP6_MIB_OUTNEIGHBORADVERTISEMENTS),
 122         SNMP_MIB_ITEM("Icmp6OutRedirects", ICMP6_MIB_OUTREDIRECTS),
 123         SNMP_MIB_ITEM("Icmp6OutGroupMembResponses", ICMP6_MIB_OUTGROUPMEMBRESPONSES),
 124         SNMP_MIB_ITEM("Icmp6OutGroupMembReductions", ICMP6_MIB_OUTGROUPMEMBREDUCTIONS),
 125         SNMP_MIB_SENTINEL
 126 };
 127
 128 static struct snmp_mib snmp6_udp6_list[] = {
 129         SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
 130         SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
 131         SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
 132         SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 133         SNMP_MIB_SENTINEL
 134 };
 135
 136 static unsigned long
 137 fold_field(void *mib[], int offt)
 138 {
 139         unsigned long res = 0;
 140         int i;
 141
 142         for_each_possible_cpu(i) {
 143                 res += *(((unsigned long *)per_cpu_ptr(mib[0], i)) + offt);
 144                 res += *(((unsigned long *)per_cpu_ptr(mib[1], i)) + offt);
 145         }
 146         return res;
 147 }
 148
 149 static inline void
 150 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
 151 {
 152         int i;
 153         for (i=0; itemlist[i].name; i++)
 154                 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
 155                                 fold_field(mib, itemlist[i].entry));
 156 }
 157
 158 static int snmp6_seq_show(struct seq_file *seq, void *v)
 159 {
 160         struct inet6_dev *idev = (struct inet6_dev *)seq->private;
 161
 162         if (idev) {
 163                 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
 164                 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
 165         } else {
 166                 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list);
 167                 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list);
 168                 snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
 169         }
 170         return 0;
 171 }
 172
 173 static int sockstat6_seq_open(struct inode *inode, struct file *file)
 174 {
 175         return single_open(file, sockstat6_seq_show, NULL);
 176 }
 177
 178 static struct file_operations sockstat6_seq_fops = {
 179         .owner   = THIS_MODULE,
 180         .open    = sockstat6_seq_open,
 181         .read    = seq_read,
 182         .llseek  = seq_lseek,
 183         .release = single_release,
 184 };
 185
 186 static int snmp6_seq_open(struct inode *inode, struct file *file)
 187 {
 188         return single_open(file, snmp6_seq_show, PDE(inode)->data);
 189 }
 190
 191 static struct file_operations snmp6_seq_fops = {
 192         .owner   = THIS_MODULE,
 193         .open    = snmp6_seq_open,
 194         .read    = seq_read,
 195         .llseek  = seq_lseek,
 196         .release = single_release,
 197 };
 198
 199 int snmp6_register_dev(struct inet6_dev *idev)
 200 {
 201         struct proc_dir_entry *p;
 202
 203         if (!idev || !idev->dev)
 204                 return -EINVAL;
 205
 206         if (!proc_net_devsnmp6)
 207                 return -ENOENT;
 208
 209         p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6);
 210         if (!p)
 211                 return -ENOMEM;
 212
 213         p->data = idev;
 214         p->proc_fops = &snmp6_seq_fops;
 215
 216         idev->stats.proc_dir_entry = p;
 217         return 0;
 218 }
 219
 220 int snmp6_unregister_dev(struct inet6_dev *idev)
 221 {
 222         if (!proc_net_devsnmp6)
 223                 return -ENOENT;
 224         if (!idev || !idev->stats.proc_dir_entry)
 225                 return -EINVAL;
 226         remove_proc_entry(idev->stats.proc_dir_entry->name,
 227                           proc_net_devsnmp6);
 228         return 0;
 229 }
 230
 231 int __init ipv6_misc_proc_init(void)
 232 {
 233         int rc = 0;
 234
 235         if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops))
 236                 goto proc_snmp6_fail;
 237
 238         proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net);
 239         if (!proc_net_devsnmp6)
 240                 goto proc_dev_snmp6_fail;
 241
 242         if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops))
 243                 goto proc_sockstat6_fail;
 244 out:
 245         return rc;
 246
 247 proc_sockstat6_fail:
 248         proc_net_remove("dev_snmp6");
 249 proc_dev_snmp6_fail:
 250         proc_net_remove("snmp6");
 251 proc_snmp6_fail:
 252         rc = -ENOMEM;
 253         goto out;
 254 }
 255
 256 void ipv6_misc_proc_exit(void)
 257 {
 258         proc_net_remove("sockstat6");
 259         proc_net_remove("dev_snmp6");
 260         proc_net_remove("snmp6");
 261 }
 262
 263 #else   /* CONFIG_PROC_FS */
 264
 265
 266 int snmp6_register_dev(struct inet6_dev *idev)
 267 {
 268         return 0;
 269 }
 270
 271 int snmp6_unregister_dev(struct inet6_dev *idev)
 272 {
 273         return 0;
 274 }
 275 #endif  /* CONFIG_PROC_FS */
 276
 277 int snmp6_alloc_dev(struct inet6_dev *idev)
 278 {
 279         int err = -ENOMEM;
 280
 281         if (!idev || !idev->dev)
 282                 return -EINVAL;
 283
 284         if (snmp6_mib_init((void **)idev->stats.icmpv6, sizeof(struct icmpv6_mib),
 285                            __alignof__(struct icmpv6_mib)) < 0)
 286                 goto err_icmp;
 287
 288         return 0;
 289
 290 err_icmp:
 291         return err;
 292 }
 293
 294 int snmp6_free_dev(struct inet6_dev *idev)
 295 {
 296         snmp6_mib_free((void **)idev->stats.icmpv6);
 297         return 0;
 298 }
 299
 300